Regarding "extra quality," I'm assuming you're referring to enhanced graphics, gameplay, or other features. Super Mario Bros. Wonder boasts:
Experience the full floral-flavored chaos of Super Mario Bros. Wonder on Nintendo Switch. This release includes the base game (NSP/XCI) plus the latest update (v1.0.1), featuring all Wonder Effects, playable characters like Daisy, Yoshi, and Nabbit, and the new online live-reaction features. super mario bros wonder switch nsp xci update extra quality
These are digital replicas of the physical game cartridge. XCIs are generally easier to manage because they often bundle the base game and original launch data into a single file. Regarding "extra quality," I'm assuming you're referring to
Resolves minor physics glitches or soft-locks. Wonder on Nintendo Switch
Switch audio is compressed (192kbps AAC). By using an emulator, you bypass this. Ensure your audio backend is set to with Volume Equalization enabled. The jazzy, Big Band soundtrack of Wonder (especially the "Welcome to the Flower Kingdom" theme) sounds exponentially better.